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NOTE: If the memory module is not installed properly, the computer may not boot properly. No error message indicates this failure. NOTICE: If the cover is difficult to close, remove the module and reinstall it. Forcing the cover to close may damage your computer. Back to Contents Page Communications Cards Dell™ Latitude™ D620 Service Manual Wireless Local Area Network (WLAN) Card Mobile Broadband Card Subscriber Identity Module (SIM) Card Wireless Local Area Network (WLAN) Card If you ordered a WLAN card with your computer, the card is already installed. 1. Follow the procedures in Before You Begin. 2. Remove the hinge cover (see Hinge Cover). 3. Remove the keyboard (see Keyboard). 4. If a WLAN card is not already installed, go to step 5. If you are replacing a WLAN card, remove the existing card: a. Disconnect the WLAN card from any attached cables. b. Use your fingertips to carefully spread apart the metal securing tabs until the card pops up slightly. c. Slide and lift the WLAN card out of its connector. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. 1 WLAN card 2 antenna cables (2) NOTICE: To prevent damage to the connector, do not use tools to spread the securing clips. 5. To install a WLAN card: a. Move any antenna cables out of the way to make space for the WLAN card. b. Align the WLAN card with the connector at a 45-degree angle, and press the card into the connector until you feel a click. c. Connect the antenna cables to the WLAN card, ensuring that you route the cables correctly. Mobile Broadband Card If you ordered a Mobile Broadband card with your computer, the card is already installed. 1 WLAN card 2 metal securing tabs (2) NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors and realign the card. NOTE: Do not insert a Mobile Broadband card into the WLAN card slot. 1 WLAN card 2 antenna cable connectors NOTICE: To avoid damaging the WLAN card, never place cables on top of or under the card. NOTE: Your WLAN card may have two or three antenna cable connectors, depending on the type of card you ordered. NOTE: For more specific information about which cable to connect to which connector, see the documentation that came with your WLAN card. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. 1. Follow the procedures in Before You Begin. 2. Remove the hinge cover (see Hinge Cover). 3. Remove the keyboard (see Keyboard). 4. If a Mobile Broadband card is not already installed, go to step 5. If you are replacing a Mobile Broadband card, remove the existing card: a. Disconnect the Mobile Broadband card from any attached cables. b. Use your fingertips to carefully spread apart the metal securing tabs until the card pops up slightly. c. Slide and lift the Mobile Broadband card out of its connector. 5. To install a Mobile Broadband card: a. Move any antenna cables out of the way to make space for the Mobile Broadband card. b. Align the card with the connector at a 45-degree angle, and press the card into the connector until you feel a click. 1 Mobile Broadband card 2 antenna wires (2) NOTICE: To prevent damage to the connector, do not use tools to spread the securing clips. 1 Mobile Broadband card 2 metal securing tabs (2) NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors and realign the card. NOTE: Do not insert a WLAN card into the Mobile Broadband card slot. NOTICE: The Mobile Broadband card may have one or two connectors, depending on the type of card you ordered. 6. Connect the antenna cable or cables to the Mobile Broadband card, ensuring that you route the cables correctly. Subscriber Identity Module (SIM) Card 1. Follow the procedures in Before You Begin. 2. With the cut-off corner on the card facing away from the card compartment, insert the SIM card into the compartment so that it slides under the metal tabs on the sides. Back to Contents Page 1 Mobile Broadband card 2 antenna wires (2) NOTICE: To avoid damaging the Mobile Broadband card, never place cables on top of or under the card. NOTE: For more specific information about which cable to connect to which connector, see the documentation that came with your Mobile Broadband card. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. 1 SIM card 2 metal brackets (2) NOTICE: Do not touch the SIM card connectors to protect the card from electrostatic discharge (ESD). To prevent ESD, hold the card in your hand before you insert or remove the card. Back to Contents Page Modem Dell™ Latitude™ D620 Service Manual 1. Follow the instructions in Before Working Inside Your Computer. 2. Remove the hinge cover (see Hinge Cover). 3. Remove the optical drive (see Media Bay Devices). 4. Remove the keyboard (see Keyboar...